765216255 has 8 divisors (see below), whose sum is σ = 1224346032. Its totient is φ = 408115328.

The previous prime is 765216247. The next prime is 765216281. The reversal of 765216255 is 552612567.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 765216255 - 2³ = 765216247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25507194 + ... + 25507223.

It is an arithmetic number, because the mean of its divisors is an integer number (153043254).

Almost surely, 2^765216255 is an apocalyptic number.

765216255 is a deficient number, since it is larger than the sum of its proper divisors (459129777).

765216255 is a wasteful number, since it uses less digits than its factorization.

765216255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51014425.

The product of its digits is 126000, while the sum is 39.

The square root of 765216255 is about 27662.5424536502. The cubic root of 765216255 is about 914.6635987530.

The spelling of 765216255 in words is "seven hundred sixty-five million, two hundred sixteen thousand, two hundred fifty-five".